had-utils.collections
borderclj
(border grid i)grid should be a rectangular collection of collections. Adds i
as a border around the supplied grid.
`grid` should be a rectangular collection of collections. Adds `i` as a border around the supplied grid.
border-and-flattenclj
(border-and-flatten grid i)Borders grid with i and then makes it into a
one dimensional vector
Borders `grid` with `i` and then makes it into a one dimensional vector
bordervclj
(borderv grid i)grid should be a rectangular collection of collections. Adds i
as a border around grid. Return a vector of vectors
`grid` should be a rectangular collection of collections. Adds `i` as a border around `grid`. Return a vector of vectors
bracketclj
(bracket coll i)Add the element i to the start and end of coll.
Add the element `i` to the start and end of `coll`.
bracketvclj
(bracketv coll i)Add the element i to the start and end of coll and return a vector.
Add the element `i` to the start and end of `coll` and return a vector.
count-byclj
(count-by f coll)Return a map from the distinct values of f applied to coll
to the frequencies they occur.
Return a map from the distinct values of `f` applied to `coll` to the frequencies they occur.
count-whenclj
(count-when coll)(count-when coll f)Count the number of elements in coll where f returns true.
If not supplied use identity as f.
Count the number of elements in `coll` where `f` returns true. If not supplied use identity as `f`.
map-kvclj
(map-kv val-fn coll)(map-kv key-fn val-fn coll)Construct a new map from an existing one.
Each of val-fn and key-fn (optional - default (fn [k _] k)) are
a function of two arguments, the key and value.
Note that to make the usage more natural the optional key-fn
is the first argument when used.
Construct a new map from an existing one. Each of `val-fn` and `key-fn` (optional - default `(fn [k _] k))` are a function of two arguments, the key and value. Note that to make the usage more natural the optional `key-fn` is the first argument when used.
neighborsclj
(neighbors cols loc)loc is assumed to be a coordinate into a flattened two-dimensional grid with cols columens.
Gives a vector of coordinates of the horizontal and vertical neighbors. Does not check bounds.
`loc` is assumed to be a coordinate into a flattened two-dimensional grid with `cols` columens. Gives a vector of coordinates of the horizontal and vertical neighbors. Does not check bounds.
neighbors-with-diagonalsclj
(neighbors-with-diagonals cols loc)loc is assumed to be a coordinate into a flattened two-dimensional grid with cols columens.
Gives a vector of the coordinates of horizontal, vertical, and diagonal neighbors.
Does not check bounds.
`loc` is assumed to be a coordinate into a flattened two-dimensional grid with `cols` columens. Gives a vector of the coordinates of horizontal, vertical, and diagonal neighbors. Does not check bounds.
transposeclj
(transpose seqs)Transpose a rectangular sequence of sequences.
Transpose a rectangular sequence of sequences.
transposevclj
(transposev seqs)Transpose a rectangular sequence of sequences, returning a vector of vectors.
Transpose a rectangular sequence of sequences, returning a vector of vectors.
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